1 // MPTable generation (on emulators)
3 // Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2006 Fabrice Bellard
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
8 #include "util.h" // dprintf
9 #include "config.h" // CONFIG_*
10 #include "mptable.h" // MPTABLE_SIGNATURE
11 #include "paravirt.h" // qemu_cfg_irq0_override
21 dprintf(3, "init MPTable\n");
23 // Config structure in temp area.
24 struct mptable_config_s *config = malloc_tmp(32*1024);
29 memset(config, 0, sizeof(*config));
30 config->signature = MPCONFIG_SIGNATURE;
32 memcpy(config->oemid, CONFIG_CPUNAME8, sizeof(config->oemid));
33 memcpy(config->productid, "0.1 ", sizeof(config->productid));
34 config->lapic = BUILD_APIC_ADDR;
37 u32 cpuid_signature, ebx, ecx, cpuid_features;
38 cpuid(1, &cpuid_signature, &ebx, &ecx, &cpuid_features);
39 if (! cpuid_signature) {
40 // Use default values.
41 cpuid_signature = 0x600;
42 cpuid_features = 0x201;
45 if (cpuid_features & (1 << 28)) {
46 /* Only populate the MPS tables with the first logical CPU in
48 pkgcpus = (ebx >> 16) & 0xff;
49 pkgcpus = 1 << (__fls(pkgcpus - 1) + 1); /* round up to power of 2 */
51 u8 apic_version = readl((u8*)BUILD_APIC_ADDR + 0x30) & 0xff;
54 struct mpt_cpu *cpus = (void*)&config[1], *cpu = cpus;
56 for (i = 0; i < MaxCountCPUs; i+=pkgcpus) {
57 memset(cpu, 0, sizeof(*cpu));
58 cpu->type = MPT_TYPE_CPU;
60 cpu->apicver = apic_version;
61 /* cpu flags: enabled, bootstrap cpu */
62 cpu->cpuflag = ((i<CountCPUs) ? 0x01 : 0x00) | ((i==0) ? 0x02 : 0x00);
63 cpu->cpusignature = cpuid_signature;
64 cpu->featureflag = cpuid_features;
67 int entrycount = cpu - cpus;
70 struct mpt_bus *buses = (void*)cpu, *bus = buses;
72 struct pci_device *pci;
74 int curbus = pci_bdf_to_bus(pci->bdf);
75 if (curbus == lastbus)
78 memset(bus, 0, sizeof(*bus));
79 bus->type = MPT_TYPE_BUS;
81 memcpy(bus->bustype, "PCI ", sizeof(bus->bustype));
87 memset(bus, 0, sizeof(*bus));
88 bus->type = MPT_TYPE_BUS;
89 isabusid = bus->busid = lastbus + 1;
90 memcpy(bus->bustype, "ISA ", sizeof(bus->bustype));
92 entrycount += bus - buses;
95 u8 ioapic_id = CountCPUs;
96 struct mpt_ioapic *ioapic = (void*)bus;
97 memset(ioapic, 0, sizeof(*ioapic));
98 ioapic->type = MPT_TYPE_IOAPIC;
99 ioapic->apicid = ioapic_id;
100 ioapic->apicver = 0x11;
101 ioapic->flags = 1; // enable
102 ioapic->apicaddr = BUILD_IOAPIC_ADDR;
106 struct mpt_intsrc *intsrcs = (void*)&ioapic[1], *intsrc = intsrcs;
108 unsigned short mask = 0, pinmask = 0;
112 int pin = pci_config_readb(bdf, PCI_INTERRUPT_PIN);
113 int irq = pci_config_readb(bdf, PCI_INTERRUPT_LINE);
116 if (dev != pci_bdf_to_busdev(bdf)) {
117 dev = pci_bdf_to_busdev(bdf);
120 if (pinmask & (1 << pin)) /* pin was seen already */
122 pinmask |= (1 << pin);
124 memset(intsrc, 0, sizeof(*intsrc));
125 intsrc->type = MPT_TYPE_INTSRC;
126 intsrc->irqtype = 0; /* INT */
127 intsrc->irqflag = 1; /* active high */
128 intsrc->srcbus = pci_bdf_to_bus(bdf); /* PCI bus */
129 intsrc->srcbusirq = (pci_bdf_to_dev(bdf) << 2) | (pin - 1);
130 intsrc->dstapic = ioapic_id;
131 intsrc->dstirq = irq;
135 for (i = 0; i < 16; i++) {
136 memset(intsrc, 0, sizeof(*intsrc));
139 intsrc->type = MPT_TYPE_INTSRC;
140 intsrc->irqtype = 0; /* INT */
141 intsrc->irqflag = 0; /* conform to bus spec */
142 intsrc->srcbus = isabusid; /* ISA bus */
143 intsrc->srcbusirq = i;
144 intsrc->dstapic = ioapic_id;
146 if (qemu_cfg_irq0_override()) {
147 /* Destination 2 is covered by irq0->inti2 override (i ==
148 0). Source IRQ 2 is unused */
157 /* Local interrupt assignment */
158 intsrc->type = MPT_TYPE_LOCAL_INT;
159 intsrc->irqtype = 3; /* ExtINT */
160 intsrc->irqflag = 0; /* PO, EL default */
161 intsrc->srcbus = isabusid; /* ISA */
162 intsrc->srcbusirq = 0;
163 intsrc->dstapic = 0; /* BSP == APIC #0 */
164 intsrc->dstirq = 0; /* LINTIN0 */
167 intsrc->type = MPT_TYPE_LOCAL_INT;
168 intsrc->irqtype = 1; /* NMI */
169 intsrc->irqflag = 0; /* PO, EL default */
170 intsrc->srcbus = isabusid; /* ISA */
171 intsrc->srcbusirq = 0;
172 intsrc->dstapic = 0; /* BSP == APIC #0 */
173 intsrc->dstirq = 1; /* LINTIN1 */
175 entrycount += intsrc - intsrcs;
177 // Finalize config structure.
178 int length = (void*)intsrc - (void*)config;
179 config->entrycount = entrycount;
180 config->length = length;
181 config->checksum -= checksum(config, length);
183 // Allocate final memory locations. (In theory the config
184 // structure can go in high memory, but Linux kernels before
185 // v2.6.30 crash with that.)
186 struct mptable_config_s *finalconfig = malloc_fseg(length);
187 struct mptable_floating_s *floating = malloc_fseg(sizeof(*floating));
188 if (!finalconfig || !floating) {
195 memcpy(finalconfig, config, length);
198 /* floating pointer structure */
199 memset(floating, 0, sizeof(*floating));
200 floating->signature = MPTABLE_SIGNATURE;
201 floating->physaddr = (u32)finalconfig;
202 floating->length = 1;
203 floating->spec_rev = 4;
204 floating->checksum -= checksum(floating, sizeof(*floating));
206 dprintf(1, "MP table addr=%p MPC table addr=%p size=%d\n",
207 floating, finalconfig, length);